sandbox: Allow the console to work earlier

With sandbox, errors and problems may be reported before console_init_f()
is executed. For example, an argument may not parse correctly or U-Boot may
panic(). At present this output is swallowed so there is no indication what
is going wrong.

Adjust the console to deal with a very early sandbox setup, by detecting that
there is no global_data yet, and calling os functions in that case.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 88dd371760..ef6a651a60 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -388,3 +388,14 @@ ssize_t os_get_filesize(const char *fname)
 		return ret;
 	return buf.st_size;
 }
+
+void os_putc(int ch)
+{
+	putchar(ch);
+}
+
+void os_puts(const char *str)
+{
+	while (*str)
+		os_putc(*str++);
+}